Iowa State University Herbarium

Latest version published by United States Geological Survey on Dec 29, 2022 United States Geological Survey

Download the latest version of this resource data as a Darwin Core Archive (DwC-A) or the resource metadata as EML or RTF:

Data as a DwC-A file download 24,775 records in English (998 KB) - Update frequency: not planned
Metadata as an EML file download in English (89 KB)
Metadata as an RTF file download in English (7 KB)


The Ada Hayden (Iowa State University) Herbarium has the largest collection of Iowa plants and fungi, containing over 600,000 specimens of vascular plants, bryophytes, fungi, and lichens. This dataset describes 24,775 specimens from the Plantae collection. For the Fungi collection, please see iDigBio (

Data Records

The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 24,775 records.

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.


The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

Lewis D (2022): Iowa State University Herbarium. v1.8. United States Geological Survey. Dataset/Occurrence.


Researchers should respect the following rights statement:

The publisher and rights holder of this work is United States Geological Survey. To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: 08fa9dda-6ad2-49c5-8e49-c20058214268.  United States Geological Survey publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF-US.


Metadata; Metadata; North America (continent); United States (nation); State of Iowa; Specimen


Deborah Lewis
  • Metadata Provider
  • Originator
  • Point Of Contact
Curator, Ada Hayden Herbarium
Iowa State University
340 Bessey Hall
50011 Ames
Annie Simpson
  • Metadata Provider
biologist and information scientist
U.S. Geological Survey
12201 Sunrise Valley Dr, Mailstop 302
20192 Reston
+1 703-648-4281
Lynn Clark
  • Point Of Contact
Director, Ada Hayden Herbarium
Iowa State University
340 Bessey Hall
50011 Ames

Geographic Coverage

The state of Iowa.

Bounding Coordinates South West [40.397, -96.614], North East [43.485, -90.154]

Taxonomic Coverage

541 plant names at the Genus level and below (mostly species).

Genus Carex

Temporal Coverage

Start Date / End Date 1813-01-01 / 2012-01-01

Collection Data

Collection Name Ada Hayden Herbarium at Iowa State University (ISC)
Collection Identifier
Parent Collection Identifier not applicable

Additional Metadata

Georeferenced coordinates that are provided are calculated centroids that were added during data processing by USGS BISON based on provided county names, and mentioned in georeferenceRemarks. County FIPS codes were derived during data cleaning and appear in the higherGeographyID field.

Alternative Identifiers 08fa9dda-6ad2-49c5-8e49-c20058214268